Watsco: The HVAC Distributor That Owns a Piece of Its Suppliers

Part of Distributor Playbooks — strategy teardowns of every company on the 2025 MDM Top Distributors lists.

Watsco sits at #1 in HVACR on Modern Distribution Management's 2025 Top Distributors list, the trade press's annual ranking of North America's largest wholesale distributors, on 2024 revenue of $7.6 billion. That scale alone would make Watsco a fixture on any strategy team's watch list. What makes it a genuinely unusual case is the machinery underneath the number: a distributor that has spent forty years buying up the very market it operates in, while quietly becoming a part-owner of one of the manufacturers it sells for.

The consolidator that never sold itself

Watsco started as Wagner Tool & Supply, a New York manufacturer of HVAC/R parts and tools, before reincorporating in Florida and going public in 1963. The pivot that actually built today's company came in 1989, when it acquired an 80 percent stake in Gemaire Distributors and moved from making equipment to selling it, according to the company's own history as documented on Wikipedia. Every decade since has added a zero: $1 billion in revenue by 1998, $2 billion by 2009, $7.24 billion in 2025. Along the way it swallowed hundreds of smaller family distributors, most recently Jackson Supply Company, a 25-location, roughly $230 million Sunbelt operator that had itself been independent for more than 50 years.

That is the paradox worth naming plainly: Watsco is the industry's most aggressive consolidator, the buyer that ends a hundred other founders' independence, yet Watsco itself has never been rolled up. Albert H. Nahmad has run the company as chairman and CEO since 1972, and his son Aaron "A.J." Nahmad now serves as president, per Wikipedia's leadership record. In a distribution sector where private equity has bought and flipped competitor after competitor over the past decade, Watsco is the rare case of a public, family-led acquirer eating the roll-up wave rather than becoming part of it.

A distributor with equity in its own supplier

The less obvious move sits inside Watsco's manufacturer relationships. In 2009 the company formed its first joint venture with Carrier Corporation, folding Carrier-branded sales and distribution locations into what became Carrier Enterprise, with Watsco holding the controlling stake and Carrier retaining a minority interest, according to the acquisition history Wikipedia records. Additional Carrier Enterprise entities followed for the Northeast and for Canada.

Most distributors are strictly downstream of their manufacturers: they buy equipment, mark it up, and move it. Watsco's Carrier Enterprise structure makes it something closer to a joint operating partner in one of its own supply lines. That has an obvious upside: tighter alignment on inventory, co-branded marketing, and priority access to new product lines from a top-tier OEM. It also creates a strategic tension a sharp competitor would flag immediately. A distributor that is also part-owner of a manufacturer's go-to-market arm has less room to play its suppliers off each other on price and terms, the classic leverage independent distributors use. Watsco has bet that scale and alignment with Carrier outweigh that lost flexibility, and the bet has held for over 15 years. Whether it holds as well if Carrier's product roadmap diverges from what contractors actually want is the kind of question a channel analyst files away for later.

Building a digital storefront on top of a parts counter

The other place Watsco looks less like a legacy wholesaler and more like a software company is its digital sales channel. E-commerce represented roughly 36 percent of trailing twelve-month sales in early 2026, and the company has said digital transactions exceed 60 percent of sales in some individual markets, per its investor disclosures summarized by StockTitan. The centerpiece is OnCallAir, a platform that lets HVAC contractors build and present financed equipment quotes to homeowners on the spot rather than mailing a proposal days later. In 2025 OnCallAir generated roughly $1.8 billion in gross merchandise value and was used to present quotes to hundreds of thousands of households.

That is a meaningfully different growth lever than adding branches. A parts counter can only serve the contractors who drive to it; a quoting platform embedded in a contractor's sales process captures revenue at the point where the homeowner actually decides. Watsco's decentralized operating model, in which local business units like Gemaire, Baker Distributing, and East Coast Metal keep their own management and customer relationships according to the company's own description of its structure, gave it enough operating latitude to build and push this platform without disrupting the branch relationships that still move most physical inventory.

Discipline over volume when the market turned

2025 was not a growth year for residential HVAC replacement demand, and Watsco's revenue slipped nearly 5 percent to $7.24 billion. The response is the part worth watching. Instead of discounting to defend volume, Watsco posted record full-year gross margins of 28.0 percent, cut inventory roughly 30 percent from its peak, and still raised its annual dividend 10 percent to $13.20 per share, extending a streak of 52 consecutive years of dividend payments, per the same investor summary. For a company whose entire growth story has been built on acquisition and expansion, choosing margin discipline over market-share defense in a down year is a tell about what the Nahmad family actually optimizes for.

A short table of the record

The unglamorous truth of distribution is that whoever controls the catalog, the branch network, and the data behind both tends to win the category, no matter how the demand cycle bends in any given year. That is the thread this series keeps pulling on, one distributor at a time.